Abstract
Within the framework of geometric optics, this study analyzes the rotational tuning of the period of an interference pattern formed by converging light beams on a photodetector that is fixed relative to a mirrorless two-beam interferometer based on a beam-splitting cube. Equations are derived, whose solutions are the dependences of the tuning range on the base position of the initial light beam on the input surface of the cube and on the diameter of this beam. These dependences are obtained for several refractive indices of the cube material, and the significance of this parameter for the characteristics of the interferometer under study is shown.
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